19992008

素因数分解:

$2^3\times {\mathrm{809}}^1\times {\mathrm{3089}}^1$

素因数の和:3904

約数の個数: 16

約数和(自身を含む): 37543500

約数和(自身を除く): 17551492

約数列:

[1, 2, 4, 8, 809, 1618, 3089, 3236, 6178, 6472, 12356, 24712, 2499001, 4998002, 9996004, 19992008]

約数ペア:

[(1, 19992008), (2, 9996004), (4, 4998002), (8, 2499001), (809, 24712), (1618, 12356), (3089, 6472), (3236, 6178)]